MC68HC11F1CPU4 Freescale Semiconductor, MC68HC11F1CPU4 Datasheet - Page 125

• Manufacturer Part Number: MC68HC11F1CPU4
• Description: IC MCU 512 EEPROM 4MHZ 80-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC11F1CPU4

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 30
• Program Memory Type: ROMless
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.75 V ~ 5.25 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Program Memory Size: -

10.1 Overview
10.1.1 Multiplexer
TECHNICAL DATA
The analog-to-digital (A/D) system, a successive approximation converter, uses an all-
capacitive charge redistribution technique to convert analog signals to digital values.
The A/D system is an 8-channel, 8-bit, multiplexed-input converter. The AV
used to input supply voltage to the A/D converter. This allows the supply voltage to be
bypassed independently. The converter does not require external sample and hold cir-
cuits because of the type of charge redistribution technique used. A/D converter timing
can be synchronized to the system E clock, or to an internal resistor capacitor (RC)
oscillator. The A/D converter system consists of four functional blocks: multiplexer, an-
alog converter, digital control, and result storage. Refer to Figure 10-1.
The multiplexer selects one of 16 inputs for conversion. Input selection is controlled by
the value of bits CD–CA in the ADCTL register. The eight port E pins are fixed-direc-
tion analog inputs to the multiplexer, and internal analog signal lines are routed to it.
SECTION 10 ANALOG-TO-DIGITAL CONVERTER
Freescale Semiconductor, Inc.
For More Information On This Product,
ANALOG-TO-DIGITAL CONVERTER
Go to: www.freescale.com
DD
pin is
10-1